Manibolt Driller Exhaust Stud Jig. Allows you to drill out broken manifold studs safely. CSB-002-F Ford 4.65.46.8 Modular. Comes with 2 taps m8x1.25. You will need to buy the following drill bits: 3/16 cobalt, 17/64 cobalt, P.323. These needed drill bits can be purchased Thru www.maniboltdriller.com